nwerc-2016/full/C.py

8 lines
231 B
Python

from __future__ import print_function
import sys
x, y = map(float, sys.stdin.readline().split())
n = float(sys.stdin.readline())
for l,u,f in ( map(float, line.split()) for line in sys.stdin ):
y -= (u-l)*(1-f)
print(x / y)